permutations

Permutations refer to the different ways you can arrange a set of items where the order matters. For example, if you have three books—A, B, and C—there are six possible arrangements (like ABC, ACB, BAC, BCA, CAB, CBA). The number of permutations depends on how many items you have and how many of them you choose to arrange. Mathematically, permutations help us count and understand the different possible sequences, which is useful in scenarios like organizing, scheduling, or solving problems involving sequences where order affects the outcome.